Joel Kingston is a copper’s copper from a respected and notable police family but when he is found dead, floating in a park lake, DCI Vera Stanhope (Brenda Blethyn) finds herself investigating both sides of the thin blue line in order to find his killer. A complex family dynamic, tensions at work, and brushes with the underworld, paint a dark and complex picture. Joel was there to serve and protect but did his stubborn commitment to justice at any price lead to his death? Or, was he killed to stop him revealing a secret that would destroy someone’s life? Vera steps on toes and ruffles a few police feathers as she searches for answers as to why PC Joel Kingston is no longer on the beat.